We use the wireless remote control receiver and transmitter to remote control four AC lamps. The working distance is 3000m-5000m. The maximum current of the relay is 30A. It has waterproof case. This kind of wireless remote control kit is two-way and has feedback function. The working voltage is 110V/120V/220V/240Vac. <br />Model: 0020673 (S4PXW-AC220-ANT3 & CC-4) <br />Online shop: http://www.carymart.com <br />Email: katherinexjy@gmail.com <br />Skype: gysyxjy <br />Facebook: https://www.facebook.com/CaryMart-284396935008403/ <br />Twitter: https://twitter.com/CaryMart305